1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
#![feature(allow_internal_unstable)]
#![cfg_attr(bootstrap, feature(let_else))]
#![feature(never_type)]
#![feature(proc_macro_diagnostic)]
#![feature(proc_macro_span)]
#![allow(rustc::default_hash_types)]
#![deny(rustc::untranslatable_diagnostic)]
#![deny(rustc::diagnostic_outside_of_impl)]
#![recursion_limit = "128"]
use synstructure::decl_derive;
use proc_macro::TokenStream;
mod diagnostics;
mod hash_stable;
mod lift;
mod newtype;
mod query;
mod serialize;
mod symbols;
mod type_foldable;
mod type_visitable;
#[proc_macro]
pub fn rustc_queries(input: TokenStream) -> TokenStream {
query::rustc_queries(input)
}
#[proc_macro]
pub fn symbols(input: TokenStream) -> TokenStream {
symbols::symbols(input.into()).into()
}
/// Creates a struct type `S` that can be used as an index with
/// `IndexVec` and so on.
///
/// There are two ways of interacting with these indices:
///
/// - The `From` impls are the preferred way. So you can do
/// `S::from(v)` with a `usize` or `u32`. And you can convert back
/// to an integer with `u32::from(s)`.
///
/// - Alternatively, you can use the methods `S::new(v)` and `s.index()`
/// to create/return a value.
///
/// Internally, the index uses a u32, so the index must not exceed
/// `u32::MAX`. You can also customize things like the `Debug` impl,
/// what traits are derived, and so forth via the macro.
#[proc_macro]
#[allow_internal_unstable(step_trait, rustc_attrs, trusted_step)]
pub fn newtype_index(input: TokenStream) -> TokenStream {
newtype::newtype(input)
}
/// Implements the `fluent_messages` macro, which performs compile-time validation of the
/// compiler's Fluent resources (i.e. that the resources parse and don't multiply define the same
/// messages) and generates constants that make using those messages in diagnostics more ergonomic.
///
/// For example, given the following invocation of the macro..
///
/// ```ignore (rust)
/// fluent_messages! {
/// typeck => "./typeck.ftl",
/// }
/// ```
/// ..where `typeck.ftl` has the following contents..
///
/// ```fluent
/// typeck_field_multiply_specified_in_initializer =
/// field `{$ident}` specified more than once
/// .label = used more than once
/// .label_previous_use = first use of `{$ident}`
/// ```
/// ...then the macro parse the Fluent resource, emitting a diagnostic if it fails to do so, and
/// will generate the following code:
///
/// ```ignore (rust)
/// pub static DEFAULT_LOCALE_RESOURCES: &'static [&'static str] = &[
/// include_str!("./typeck.ftl"),
/// ];
///
/// mod fluent_generated {
/// mod typeck {
/// pub const field_multiply_specified_in_initializer: DiagnosticMessage =
/// DiagnosticMessage::fluent("typeck_field_multiply_specified_in_initializer");
/// pub const field_multiply_specified_in_initializer_label_previous_use: DiagnosticMessage =
/// DiagnosticMessage::fluent_attr(
/// "typeck_field_multiply_specified_in_initializer",
/// "previous_use_label"
/// );
/// }
/// }
/// ```
/// When emitting a diagnostic, the generated constants can be used as follows:
///
/// ```ignore (rust)
/// let mut err = sess.struct_span_err(
/// span,
/// fluent::typeck::field_multiply_specified_in_initializer
/// );
/// err.span_default_label(span);
/// err.span_label(
/// previous_use_span,
/// fluent::typeck::field_multiply_specified_in_initializer_label_previous_use
/// );
/// err.emit();
/// ```
#[proc_macro]
pub fn fluent_messages(input: TokenStream) -> TokenStream {
diagnostics::fluent_messages(input)
}
decl_derive!([HashStable, attributes(stable_hasher)] => hash_stable::hash_stable_derive);
decl_derive!(
[HashStable_Generic, attributes(stable_hasher)] =>
hash_stable::hash_stable_generic_derive
);
decl_derive!([Decodable] => serialize::decodable_derive);
decl_derive!([Encodable] => serialize::encodable_derive);
decl_derive!([TyDecodable] => serialize::type_decodable_derive);
decl_derive!([TyEncodable] => serialize::type_encodable_derive);
decl_derive!([MetadataDecodable] => serialize::meta_decodable_derive);
decl_derive!([MetadataEncodable] => serialize::meta_encodable_derive);
decl_derive!([TypeFoldable, attributes(type_foldable)] => type_foldable::type_foldable_derive);
decl_derive!([TypeVisitable, attributes(type_visitable)] => type_visitable::type_visitable_derive);
decl_derive!([Lift, attributes(lift)] => lift::lift_derive);
decl_derive!(
[SessionDiagnostic, attributes(
// struct attributes
diag,
help,
note,
warning,
// field attributes
skip_arg,
primary_span,
label,
subdiagnostic,
suggestion,
suggestion_short,
suggestion_hidden,
suggestion_verbose)] => diagnostics::session_diagnostic_derive
);
decl_derive!(
[LintDiagnostic, attributes(
// struct attributes
diag,
help,
note,
warning,
// field attributes
skip_arg,
primary_span,
label,
subdiagnostic,
suggestion,
suggestion_short,
suggestion_hidden,
suggestion_verbose)] => diagnostics::lint_diagnostic_derive
);
decl_derive!(
[SessionSubdiagnostic, attributes(
// struct/variant attributes
label,
help,
note,
warning,
suggestion,
suggestion_short,
suggestion_hidden,
suggestion_verbose,
multipart_suggestion,
multipart_suggestion_short,
multipart_suggestion_hidden,
multipart_suggestion_verbose,
// field attributes
skip_arg,
primary_span,
suggestion_part,
applicability)] => diagnostics::session_subdiagnostic_derive
);
|
